# A168405 (b-file synthesized from sequence entry)
0 1
1 2
2 16
3 520
4 66560
5 33882400
6 69055283200
7 564153087455360
8 18462510039810703360
9 2418626471936038215754240
10 1267795676362601991645220044800
11 2658560574070850656450883768752998400